Lathe attachment.



R. JANTSCH.

LATHE ATTAUHMBNT.

' APPLICATION FILED JULY 1B, 1913. Qgge Patented Nov.25, 1913.

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Pfc/rara l/a/f/Jc/v Wglrtgne se Inventor 5 LU. w., Qwg W f7 5 Attorney B. JANTsH. LTHB TTAOHHBNT. APPLIOATIOI fnl-BD JULY l2, 113 lQAQ@ mama Nov. z5, 1913.

Ficha/ddd IJC/l.

Inventor Mg ovmv LU. Saz,

Attorney itnesses:

R. JANTSCH. LATHE ATTACHMENT.

unieuro! mm1 JULY 1a, 101s.

1,079,494. Patented Nov. 25, 1913.

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Pfc/lard Jan/sch @nasse I. Inventor /w- @11E owwua (4j. L@ gf Attorney STATES PATENT OFFTE.

RICHARD JANTSCH, OF CINCINNATI, OHIO, ASSIGNOB TO THE AMERICAN TOOL WORKS COMPANY, OF CINCINNATI, OHIO.

LATHE ATTACHMENT.

aora-ias.

Specification of Letters Patent.

Patented Nov. 25, 1913.

To all whom it may concern.'

Bc it known that I, Riemann JAN'rsCH, a citizen of Austria-Hungary, residin in Cincinnati, Hamilton county, Ohio, ave 1nvented certain new and useful Improvements in Lathe Attachments, of which the following is a specification.

This invention relates to an attachment to be a lied to any ordinary en 'ne lathe of suitallile capacity, to rovide or the .turning of cranks, and t e'invention will be readil understood from the following description taken in connection with. the accompanying drawing in which Figure 1 is a .front elevation of the attachment shown in connection with a crank to be operated upon; Fig. 2 a vertical 1ongitudinal section of the head-end carrier and its bearing in the plane of linel a of Figs. B and 4; Fig. 3 an end elevation of the driving arm of the head-end carrier, shown in conjunction with a portion of the crank whose pin appears in vertical transverse section 1n the plane of line b of Fig. 1; and Fig. 4 a front elevation of the hea end carrier and its bearing, portions appearingin vertical transverse section in the plane of line c of Figs. 1 and 2.

In the drawings :-1, indicates a bearing of lar e diameter adapted to be bolted to the be of a lathe at some little distance from the face plate of the lathe, this bearing being herein referred to as the head-end bearing; 2, the cap of this bearin the ca bein divided from the base on a me pre crab y horizontal and passing) through the axis of the bearing; 3 joint. olts securing the cap of the base of the bearing; 4, a ty 1- eal form of clamp-bar to en a e under tie inner portion of the ways o t e lathe and serve in clamping the bearin to the lathebed after the manner in w ich tailstocks are clamped to lathe-beds; 5, clamp bolts coo erating with the head-end bearing and t ie clamp-bearing; (l, a tail-end bearing similar to the head-end bearin and to be similarly secured to the latheed, at such distance from the head-end bearing as the dimensions of the crank to be operated upon may dictate; 7, a large sleeve journal in head-end bearing 2 and extendm therefrom toward the face plate of the fathe; 8, tho journal portion of this sleeve, the same having running engagement with the bear- "ff ing a; e, s. amg@ on ai@ lea-hand @ad of sleeve 7, this flange bein adapted to be firmly bolted to the face pate ot the lathe; 10, a projection carried by the outer face of journal 8, the journal 8 forming a carrier, this dprojection being provided with an outwar y open radial slot; 1l, a large hollow journal running in tail-end bearing 6 and iaving a construction similar to that of journal 8, but not having the long sleeve characteristic, the tail-end journal 11 constitoting a tail-end carrier equipped with a radially slotted projection similar to the projection 10 of the head-end carrier' 12 the radial slot in the projection 10 of tht;

head-end carrier, the projection of the tailend earrier.11 havin(T a similar slot; 13, a half-box fitted separa ly in the base of the slot 12, the axis of the half-bore of this box beine' at such distance from the axis of headend caring 8 as is called for by the throw of the crank to be dealt with by the attachment, tail-end carrier 11 being rovided with a similar half-box; 14, a halt-box fitting in slot 12 and coperating with halfbox 13, tail-end carrier 11 being provided with a similar capping half-box; 15, bolts serving the double pur ose of drawing up half-box 14 to lower ha f-box 13 and secur-I ingl both half-boxes firmly in the projection 10 of the carrier, the saine general construction ap )lying to the tail-end carrier; 16, half-bus rings in the boro of the half-boxes; 17, a leftwnrd projection from the halfbushings of the tail-end carrier; 18, the crank shaft to be dealt with by the attachment, the body portion of this crank shaft, endwisc beyond the cranks, being engaged by the bashed half-boxes of the carriers; 19, one of the crank pins of the crank shaft; 20, a second crank pin of the crank shaft, Fig. 1 illustrating the attachment in connection with a dou le crank having pins disoscd at one hundred and eighty degrees roin cach other; 21, the head-end portion of the crank shaft, the sinne bein gripped in the bashed box of the head-en carrier; 22, the cheek connecting the tail-end of the crank shaft with crank in 19; 23, the check connectin the head-em of the crank shaft with cran pin 20; 24, the cheek connecting the two crank ins; 25, a driving-bar fitted "to slide in bearlngs in the head-end carrier,

and s lined in its bearin s so as not to be capabe of turning therein; 20 a similar driving-bar similarly mounted in the tailend carrier; 27, jaws carried by the inwardly projecting end of the head-end driving-bar, these jaws being open toward the axis of the lathe, and also open toward the tail-end driver, the distance between the jaws being snfiicient to freely receive the widest crankclieek which the attachment is to deal with; 2S, similar jaws oii the tail-end driving-bar 26; 29 the feather to prevent the turning of the head-end driving-bar in the head-end carrier, the tail-end driving-bar to be provided with a similar feather; 30, setscrews in the jaws of the driving-bars there being preferably a sctscrew in each jaw as illustrated, these setsci'ews being adapted to impinge upon the sides of the crank-cheeks engaged bv the jaws' 31, binders in the driving-bar bearin s oi the carriers, these binders being pre erably in the form of round plungers partially intersecting the bearin of tie driving-bars and havin cam-li te cutaway portions so that forcib e endwise movement o5 the binders 4will pinch the driving-bars in their bearings; 32, nuts on the outer ends of the binders b means of which the binders may be tightened and loosened; 83, centers or pins inserted in the ends of the head-end carrier in the axis of the carrier; and 34, an opening` in the inner wall ot the headrend cai'rier ot suiiicient size to freely admit, with suitable clearance, the head-end of any crank shaft withwhich the attachment is to deal, the tail-end carrier to be provided, in case it has a-n inner wall, witi a similar opening.

Looking at Fig. 1 it is to be understood that tlan f e 9, of the headend carrier, is to be holte to the face late of the lathe in connection with which t e attachment is to be employed, bearing l being tirml secured to the bed of the lathe. Tail-end bearing 6 is to be disposed idly upon the lathe bed at such position from the head-end bearin" as will admit the length of the crank shaft between the boxes of the carrier. Now turnin to Figs. 2 and 4 a lower half-box 13 is to e selected of such dimensions that the distance from the axis of the bore of the half-box to the axis of the carrier will e ual the throw of the crank to be dealt with. This distance is re ulated by selecting half-boxes having ases of various heights to rest uion the floor of slot of the carrier. In iigs. 2 and 4 the height of the half-box. 18 is suited to a certain crank-throw. For a greater crank-throw a half-box will be selected having a greater height. The half-box is then to be provided with a half-box 16 suited to the diameter of the crank shaft. These saine-general considerations apply to the upper half-box la and to each of the half-boxes of the tailend. carrier. The crank shaft is now to be inserted in the clamp-box of the head-end carrier after which the tailfend bearing is to be shifted toward the head-end bearing so that the tail-eiid clamp-boxes will engage the tail-end of the shaft, both sets of clampboxes engaging the shaft as close up to the outside cheeks of the cranks as possible. Head-end driving-bar 25, previously in retreated conditions of the latter is now pulled out 'to the right so that its jaws embrace cheek 23 of the crank. The bolts of the clamp-boxes are now to be tightened so as to produce an accurate though perhaps not a perfectly firm clamping of the boxes upon the shaft.l Tail-end driving-bar is now to be shifted to the left till its jaws straddle craiik-eheek 2.4. Setscrews 230 are then to be adjusted so as to swing crank pin into the common axis of the two carriers which axis it is to be understood, is to coincide. with the axis of the lathe. The bolts of the clamping-boxes and the setscrews and also the binders 31 are now to be tightened. The result of this is that the crank is firmly clam ed in the carriers in proper position for t ie turning of crank in 20. This crank pin isto be turned by tie usual operation of thetool-rest of the lathe. Crank pin 20 having been completed, the clamp-boxes and setscrews and binders will be loosened and the drivin -bars moved to position No. 3, after whici the crank shaft will be given a half turn in the clamp-boxes. Driving-bar 25. is then to be shifted to the right to enage crank-cheek 24, while driving-bar 26 isto be adjusted to the left to engage crankcheek 2Q,after which adjustment and clampings are to be etfeeted as in the first mentioned lcase, thus leaving crank pin 10 in condition to be turned.

While Fig. 1 illustrates the attachment. as dealing with a double crank it will be readily understood that the system lends itself to crank with more than two crank pins, in fact with an multiple-throw crank and regardless of t e relative angular disposition of the various crank pins.

I claim:-

1. A lathe-attachment comprising, a headend bearing adapted to be secured to a lathe-bed in front of the face plate of the lathe, a hollow head-end carrier journaled therein, a hollow sleeve projecting` from the head-end carrier toward said face plate and adapted to he secured thereto, a radiall slotted projection on the face of said head) end carrier, a half-box resting on the {loor of said slot and having such radial dimension that the axis of its bore will position it a distance from the axis of the carrier e ual to the throw of the crank to be dealt with, a half-box disposed in said slot to form a cap for the first mentioned halfbox, clamp-bolts to secure said halt-boxes and urge them toward each other, bearings carried by said carrier eccentric to the axis of the carrier, a driving-bar mounted to slide in said bearings and splined thereto, jaws carried by the end of said driving-bar, a

binder mounted in said carrier and adapted' to lock therein said driving-bar in adjusted osition, clamping means carried by said jaws and adapted to engage the sides of the cheek of a crank whose shaft engages said half-boxes, a tail-end bearing in line with the liead-end bearing` a hollow carrier jouriialed therein, halfboxes and clamping means mounted in said tail-end carrier, a driving-bar with jaws and clampiiio means mounted iii tlie tail-end carrier and adapted to engage a second cheek of a crank mounted in the first-mentioned carrier, and a binder carried by the tal-eiid carrier and adapted to lock the second driving-bar thereto in adjusted iosition, combined substantially as set fortlh.

2. A lathe-attachment comprising, a headend bearing adapted to be secured to a lathe-bed in front of the face plate of the lathe, a hollow liead-end carrier journaled therein, a hollow sleeve projecting from the head-end carrier toward said face plate and adapted to be secured thereto, a radial] slotted projection on the face of said head) end carrier, a half-box resting on the oor of said slot and having,` such radial dimension that the axis of its bore will position it a distance from the axis of the carrier equal to the throw of tlio crank to be dealt with, a half-box disposed in said slot to form a cap for the first mentioned half-box clamp-bolts to secure said half-boxes an urge them toward each other, bearings carried by said carrier eccentric to the axis of the carrier, a drivingbar mounted to slide in said bearings and splined thereto, jaws carried by the end of said driving-bar, a binder mounted in said carrier and adapted to lock therein said driving-bar in adjusted position, clamping means carried by said jaws and adapted to engage the sides of the cheek of a crank whose shaft engages said half-boxes, a tail-end bearing in line with the head-end bearing, a hollow carrier journaled therein, half-boxes and clamping means mounted in said tail-end carrier, a driving-bar with jaws and clamping means mounted in the tail-end carrier and adapted to engare a second cheek of a crank mounted in tlie first-mentioned carrier, a binder carried by the tail-end carrier and adapted to lock the second driving-bar thereto in adjusted position, and a separable ha1f bushing in each of said half-boxes, combined substantially as set forth.

3. In a lathe attachment the combination of carriers adapted to be secured to the bed of the lathe and carry and rotate therein a crank with its crank pin concentric with the axis of the carriers, a drivingbar mounted in each carrier parallel with the axis thereof and arranged for endwise sliding motion, binders mounted on the carriers to lock the driving-bar in adjusted position, 'aws carried by the inner ends of drivingars and adapted to stiaddle the cheers of a crank, and clamping` and adjustine means carried by said jaws to engage sai cheeks, substantially as set forth.

4. A driving-bar for a crank lathe comprisn a single bar-portion adapted for spline( engagement with a carrier, a air of coperatimr jaws carried by one en of snid single arortion and adapted to sti'addle the cheer of a crank, and clampin means carried by said jaws to serve in adustinfr and grip ing such crank-cheek, combined substantially as set forth.

RICHARD JANTSCH.

Witnesses:

AUGUSTUS M. Sosa, ROY M. McLAUonLiN.

Copies et this patent may be obtained for five con nach, by addressing the "Commissioner of Estonia, Washinton, D. 0." 

